Sure. It is easier to throw an off the shelf analysis at source than worrying about binary decompilation with ghidra or whatever (well, for binaries - for bytecode it is almost exactly the same when given bytecode or source). But is this a meaningful difference? Real researchers, both academic and non-academic, do inspect open source code and report vulns they find. But this isn't actually actionable information from the perspective of a user who wants to make a risk assessment about their software choices. "Hey, you can run ${STATIC_TOOL} on this app" does not actually convert to "app is free from vulns." It just doesn't.

I love static analysis for vuln detection. I did my PhD on it. It remains my day job. It helps us find vulns. It doesn't actually convert us from unsafe software to safe software.